Management Of Aquatic Resources Research Articles

Population characteristic of torpedo scad (Megalaspis cordyla Linnaeus, 1758) in the Lampung Bay: Size structure, growth type, and condition factor

Megalaspis cordyla, locally known as ikan bekre, stands as a crucial economic species commonly consumed by the people of Lampung. The escalating demand for this fish has significant implications for increased fishing activities, potentially impacting its population. This research aimed to explore the biological characteristics of M. cordyla landed at the Lempasing Fishing Port, Bandar Lampung, providing fundamental insights for fisheries resource management in the waters of Lampung Bay. Using a quantitative descriptive method, the sampled fish has been analyzed to get size structure, growth type, and fish condition factors based on length and weight data collected from M. cordyla landed weekly. Between April and June 2022, a total of 300 samples were collected, with length ranging from 230 to 430 mm TL, with the largest count (77 individuals) in the 314-334 mm interval. M. cordyla has an allometric negative growth pattern in Lampung Bay, with a growth coefficient (b) value of 2.47. Fish condition factor values ranged from 0.71 to 1.33, with June having the highest average value of 1.03. This information contributes greatly to a better understanding and long-term planning for the management of this fish population.Keywords: Allometric; Condition Factor; Length-Weight Relationship; Pelagic Fish; Aquatic Resources Management

Morfometrik Ikan Bileh (Rasbora sp.) dari Perairan Ie Sayang Kabupaten Aceh Barat

Bileh fish (Rasbora sp.) is a fish that lives in freshwater and can be found in the waters of Ie Sayang West Woyla West Aceh District. Excessive exploration has caused the population of bileh fish in nature to decrease and be limited. The first step that needs to be done in aquatic resource management is to identify the type of bileh fish to adopt its cultivation techniques. Fish identification can be done morphologically or molecularly. Morphological identification refers to morphometric studies. This study aims to identify bileh fish species from Ie Sayang waters based on morphometric characteristics. The bileh fish was obtained from community catches in September-November 2023. Morphological identification was done by visualizing and measuring morphometric characters. Data were analyzed descriptively, and the relationship between morphometric characters was analyzed by linear regression. The morphology of bileh fish has a fusiform body shape, terminal mouth type, forked caudal fin, and linea lateralis visible from the operculum to the caudal part. Total length (TL) ranged from 36.94-65.78 mm and standard length (SL) 29.01-52.49 mm. The length-weight correlation of allometric fish was negative. TL characters were closely correlated with SL, HL, DFD, ED, CPD, and VFL.

Identification and Composition of Cyanobacteria in Ecuadorian Shrimp Farming Ponds-Possible Risk to Human Health.

Toxic cyanobacterial blooms in various water bodies have been given much attention nowadays as they release hazardous substances in the surrounding areas. These toxic planktonic cyanobacteria in shrimp ponds greatly affect the survival of shrimps. Ecuador is the second highest shrimp producing country in the Americas after Brazil; and the shrimp-based economy is under threat due to toxic cyanobacterial blooms in Ecuador shrimp ponds. This study investigated the abundance of different cyanobacteria in the shrimp ponds at the Chone and Jama rivers (in Manabi province) at Ecuadorian pacific coast, focusing on different environmental factors, such as temperature, pH, salinity, and light. Temperature and pH were identified as key factors in influencing the abundance of cyanobacteria, with a significant positive correlation betweenRaphidiopsis raciborskiiand pH. The highest and lowest abundance of cyanobacteria found during the dry season in the shrimp ponds near the Chone and Jama rivers were > 3 × 106 and 1 × 106Cell.m-3, respectively. The Shannon-Wiener Diversity Index fluctuated between 0.41-1.15 and 0.31-1.15 for shrimp ponds of Chone and Jama rivers, respectively. This variation was linked to changes in salinity and the presence of harmful algal blooms, highlighting the importance of continuous monitoring. Additionally, the study areas showed eutrophic conditions with low diversity, underlining the need for additional spatiotemporal studies and expanded research in both rivers, to better understand these complex phenomena. The findings underscore the importance of continuous monitoring and expanded research in cyanobacteria ecology, with implications for public health and aquatic resource management.

Ecological Insights, and Fin Fish Diversity in Carps Spawning Grounds: Case Studies from the Surma River and Tanguar Haor, Bangladesh.

This study aims to provide a thorough ecological understanding of fin fish diversity within carp spawning grounds in the Surma River and Tanguar haor. Over two spawning seasons, this research investigates ecological factors impacting fin fish diversity and abundance in carp spawning grounds of the Surma River and Tanguar haor, emphasizing water quality, habitat features, spawn availability, and environmental influences. Fish spawn samples were collected with eight "Savar nets" at chosen sites and reared in a fiberglass tank at the mini hatchery for species identification. The representative spawn samples were examined under a microscope for preliminary species identification before rearing. The study found that both the Surma River and Tanguar haor offer ideal conditions for carp spawning due to factors such as water quality, natural food availability, habitat suitability, and favorable climatic conditions. The study identified 39 fish species under the 10 fish groups from both locations, with a higher percentage of carp species (31.42%) in the Surma River in 2021 compared to 2022 (22.50%). In Tanguar haor, the percentage of carp species was 7.55% and 6.50% in 2021 and 2022, respectively. The Surma River's ecological indices (2021-2022) indicated decreased diversity, likely due to environmental degradation, while Tanguar haor showed lower diversity possibly attributable to multiple environmental stressors. The dominant carp species, Labeo calbasu, Labeo bata, and Labeo gonius, were identified in both the Surma River and Tanguar haor. The spawning distribution varied among different locations, with some sites showing a presence of carp species, such as Hajipur (T1) in the Surma River and Alam Duar (T2) in Tanguar haor. The findings highlight the importance of hydrological and environmental parameters in shaping carp spawning habitat distribution and abundance, contributing to aquatic biodiversity conservation and resource management.

Sustainable aquatic resource management and inland fisheries in tropical Asia: Interdisciplinary and transdisciplinary approaches

The intensive utilization of tropical inland water bodies for multiple and sometimes competing activities underlines the necessity for their integrated and holistic co-management. This paper presents our synthesis on lake and reservoir fisheries in South and Southeast Asia as social–ecological systems, based on a synopsis of our research findings from a previous EU-funded research programme in Sri Lanka, Thailand and the Philippines (FISHSTRAT project). The paper attempts to merge our results with recent developments in research, policy and practice. We explore the effects of the main external and internal control mechanisms of the trophic state and pinpoint to the high production potential of traditionally unexploited small indigenous fish species. The limitations of conventional centralized management systems highlight the importance of introducing transdisciplinary approaches which integrate limnology, fish ecology and fisheries with the interests of other resource using stakeholders and decision makers in order to develop locally appropriate co-management strategies for sustainable aquatic resource use.

Phytoplankton Composition in Waters Around Hot Water Waste of Steam Electricity Power Plant Nii Tanasa

Understanding the complex dynamics of aquatic ecosystems is very important for sustainable resource management in the field of aquatic resource management studies. This study aims to determine the distribution, abundance and diversity of phytoplankton and its correlation with water temperature around the PLTU Nii Tanasa area. The sampling method used is purposive sampling by taking water samples using a plankton net at predetermined stations. Data analysis of abundance, diversity, dominance, and correlation using Microsoft excel software. The number of samples found was 12 types of phytoplankton and came from several different classes. Abundance index (N) = low-moderate fertility (low enough), diversity index (H) = moderate category, dominance (C) = low, indicating stable community structure conditions. Water quality is classified as waters with moderate levels of pollution. Correlation of abundance, diversity and dominance of phytoplankton with water temperature has a positive and negative linear relationship.

Fostering Stewardship in Managing Fisheries and Aquatic Resources in the Lens of Green Criminology

Illegal fishing imperils Gulf ecosystems, prompting this qualitative study, rooted in green criminology and purposive sampling, to explore stewardship in fisheries and aquatic resource management. Police officers (Bantay Dagat), BFAR representatives, Barangay Officials, and Fisherfolks were interviewed. This study revolved around three main thrusts: (1) common law violations relative to the fishery and aquatic resources law violations; (2) the reasons/motivational factors of engaging in the fishery and aquatic resources law violations; and (3) measures on how the community can foster stewardship in managing fisheries and aquatic resources. The findings proved that the illegal fishing activities in municipal waters and marine protected areas were done for higher income and economic sustenance but posed various threats to the sustainability of aquatic and fishery resources and the environment in Leyte Gulf. The study also found that the community can foster stewardship through participatory enforcement of aquatic and fishery laws and programs and the provisions of equipment and resources needed for more effective patrol and surveillance of marine waters to prevent and combat illegal fishing. Keywords: Green Criminology, Illegal Fishing, Stewardship, Leyte Gulf

Nanopore sequencing facilitates screening of diversity and provenance of seafood and marine wildlife

The soaring global demand for seafood has placed unprecedented pressure on fisheries, leading to the exploitation of vulnerable marine resources and data-deficient species. Over the past few decades, a surge of molecular methods has enabled identification of traded marine animal products that may be otherwise unrecognizable through morphological analysis. While universal DNA barcoding remains a powerful authentication and traceability tool, its application still requires lengthy procedures, established facilities, and assay development. In this study, we explored some of the uses and advantages of cutting-edge nanopore sequencing, a rapid and portable alternative method. We first tested the method to identify ten opportunistically sampled fishery products obtained in two different contexts: five fish fillets marketed in the UK, four shark specimens traded in Indonesia and one fish collected as part of a scientific survey. We present a full analytical workflow to produce accurate species identification based on direct, PCR-free long-read sequencing of the DNA extracted from each specimen. We then used the nanopore sequencing output to mine whole mitogenomes from samples of varying DNA quality. Finally, we used the extensive additional genomic information produced by the sequencing to pinpoint the geographic origin of two of the identified specimens for which robust baseline data existed. In the face of increasing threats to biodiversity, and the need to control exploitation and supply of fisheries and wildlife globally, this rapid and portable approach is poised to revolutionize the monitoring of seafood supply and the trade in endangered marine wildlife, contributing to the sustainable management of aquatic resources.

Analysis of The Integrity of Attitudes, Behavior, Openness and Honesty of Captured Fisheries Enterprises for The Conservation of Fish and Marine Resources

Integrity of attitude, behavior, openness and honesty are important things that capture fisheries business actors must have. Deviations in integrity are allegedly equivalent to criminal acts of corruption because they have the potential to cause very large losses to the state, which are difficult to detect and the value of the losses. In addition, failure to fulfill integrity has a huge potential for loss of sustainability of fisheries resources in the long term, and is difficult to recover. The research aims to examine the relationship between the integrity of capture fisheries business actors and efforts to preserve fish and marine resources. Descriptive research using a literature study approach combined with a limited discussion process with aquatic resource management experts in order tomaintain the sustainability of fish population dynamics due to capture fisheries exploration. The research results show that the integrity component which concerns attitudes, behavior, openness and honesty of capture fisheries business actors is an absolute thing that must be implemented and developed. Potential state losses worth billions of rupiah accompanied by massive damage to marine resources can be avoided if capture fisheries business actors carry out exploration properly and report their activities honestly and openly to the competent government authorities as a control over resource sustainability.

Prediction of water temperature of Sebou estuary (Morocco) using ANN and LR

Water temperature is an important component for river water quality. Good knowledge of river thermal regime is critical for aquatic resources management and environmental impact studies. This study aims to predicting surface water temperature at a given site of Sebou estuary (Morocco) from air temperature, using artificial intelligence applied to neural networks (NN) and linear regression (LR). The models used were applied to an hourly temperature database obtained by simulating hydraulic and thermal regime of the estuary using HEC-RAS model. Temperature data (1560) was divided into training and validation series. The results showed that coefficient of determination for training was 86.26%(NN) and 79.94%(LR). For validation it was 91.23%(NN) and 80.3%(LR). Moreover the residuals generally vary between −1.5°C and +1.5°C, no trend was noted as function of estimated temperature. Hence, it is possible to predict water temperature of estuary using air temperature. Additionally, NN model gave slightly results compared to LR.

Socio-economic appraisal of fish sanctuary on livelihood of fishermen in Chikadubi beel of Dingapota Haor, Netrokona, Bangladesh

The investigation was conducted on the livelihood status of fishers of Chikadubi beel in Dingaputa haor, Netrokona district of Bangladesh for a period of 6 months from August 2020 to December 2020. A total 50 fishers were randomly selected and data were collected from them through direct interview. Focus group discussions were carried out by a previously made checklist. The results showed that the annual income of fishermen varied from BDT 30000 (270.79 USD) to BDT 70000 (631.85 USD). Maximum (58%) fishers were low-income levels from BDT 30000 (270.79 USD) to BDT 40000 (361.05 USD) and trying to shift their professions to other subsidiary professions. Among them 66% of the respondents indicated that this sanctuary is very effective in improving socio-economic status of the fishers. Relatively middle age group (31 to 40 years) dominated in all study areas. Muslim fishermen are the most dominant in the study area. 68% of the fishers live with nuclear families. The highest percentage (62%) fishers can sign only due to economic crisis and lack of awareness about education, (24%) having Primary level education, (14%) have no education as the children dropped out from school before completing their primary education. Housing and sanitation conditions of the fishermen were not well developed. Based on various livelihood parameters, fishermen are leading very poor state of lives. Sanctuary establishment and Community based aquatic resource management strategies may be undertaken with a view to enhance fish production to improve the livelihood condition of the fishers dwelling in the Chikadubi beel area of Dingaputa haor in Bangladesh.

Preface

Pandemic COVID-19 has hardly impacted global fisheries and aquaculture, as FAO reported in the 34th session of the Committee on Fisheries (COFI) in February 2021. FOA further suggest that this pandemic impact catalyzes the fisheries sector to be more innovative, socially, and environmentally responsible. Fish and fisheries product are well-known healthy food. It contains high quality and quantity of protein and provide essential vitamins and minerals to maintain human health status. The innovation of science and technology in the fisheries sector is a crucial point to improve and assure the efficiency and sustainability of the production and utilization of the resource. Research activities and development should be synergically conducted to implement technologies that benefit the communities.Department of Fisheries, Faculty of Agriculture, Universitas Gadjah Mada, holds a biennially international symposium to provide access and exchange of research data and fisheries experience to support the transfer of knowledge and technology to strengthen the world’s fisheries sector. The 5th International Symposium on Marine and Fisheries Research (The 5th ISMFR) aims to bring together academic scientists, researcher, government institutions, private parties, and stakeholders to share and exchange progress information, experiences, and research results in all aspects of marine and fisheries sciences. The 5th ISMFR theme was “Transformative Adaptation: An Approach in Building Resilience into Sustainable Fisheries”. It covered a broad spectrum of fisheries-related topics, including aquaculture, fish disease, fish genetics, biotechnology, marine natural product, seafood processing technology, seafood safety, fisheries biology, fisheries resources management, fisheries socio-economics, oceanography, climate sciences, and marine ecotoxicology. The 5th ISMFR was held on July 24nd 2023 at Grand Rohan Hotel, Yogyakarta. The seminar’s organizing committee was located in the Department of Fisheries, Faculty of Agriculture, Universitas Gadjah Mada, Yogyakarta, Indonesia. Management of symposium was carried out using the website (https://ismfrugm.faperta.ugm.ac.id/) and for the proceeding submission using the Morresier platform.The symposium consists of plenary session and parallel presentation sessions. The plenary session presented four keynote speakers, namely Professor Dr. Rockmin Dahuri the Head of Indonesian Aquaculture Society (Indonesia), Professor Dr. Sc. Amir Husni form Department of Fisheries, Universitas Gadjah Mada, Indonesia (Indonesia), Noranizan Mohd Adzahan, Ph.D from Universiti Putra Malaysia (Malaysia), and Dr. Krishna R. Salin the President World Aquaculture Society Asia Pacific Chapter (India). A total of six parallel class was conducted with 7 invited speakers and presenters from five countries, namely Egypt, USA, Thailand, Japan, and Malaysia. Presentations in each parallel class were divided into presentation panels consisting of approximately five presenters. Each presenter was given 12 minutes for presentation and discussion. A total of 144 scientific papers has been presented at the 5th ISMFR. The 5th ISMFR was attended by 136 participants. Presenters and attendances join the symposium in person at Grand Rohan Hotel, Yogyakarta. Presenters and attendances who were unable to attend in person took part in symposium virtually via Zoom Meeting platform.This proceeding provides an opportunity for readers to gain more information from the reviewed papers that have been presented in the 5th ISMFR. The articles published in this proceeding were selected gorm the papers presented in the symposium. The reviewed from four countries (Austria, Japan, Malaysia, and Indonesia) and editors from four countries (Malaysia, Thailand, Austria, and Indonesia) have participated in the abstract screening, improving, and finalizing the manuscript. The proceedings divided into three sections, namely aquaculture, aquatic resource management, dan fish product technology. From this proceeding, readers will find recent research finding on broad aspect of fisheries and marine sciences to come up with new knowledge and idea to promote sustainable fisheries through technology and research innovation for a healthy community.We want to thank all parties for the success of the 5th ISMFR. Our gratitude is presented to organizing committee, keynote and invited speakers, reviewers, editors, and editing staff for the dedication, hard work, and tireless efforts in implementing the symposium and publication process. We express our acknowledgment to the Rector of Universitas Gadjah Mada, the Dean of the Faculty of Agriculture, the Head of Fisheries Department, and the Publication Agency of Universitas Gadjah Mada, who provided continuous support on the symposium. Our thank you also conveyed to the speakers and participants, who have given their best effort to disseminate, discuss, and publish papers. We also thank to all parties who have contributed to the success of the 5th ISMFR and the publication. We sincerely hope readers will be find notable pieces of knowledge on fisheries and marine science from different points of view.Chief EditorList of committees of the 5th ISMFR, Documentation of the 5th ISMFR are available in this pdf.

Development of lake macroinvertebrate-based multimetric index for monitoring ecological health in North Central Nigeria.

The use of organisms like macroinvertebrates in developing bioassessment tools, such as multimetric indices (MMIs), is gaining global recognition in monitoring the health status of lakes. The transition from traditional methods of physico-chemical parameters is due to the financial and time costs involved in their analysis while failing to provide accurate early warning signals on ecosystem conditions. Currently, there is scanty information on the use of MMIs in the conservation and management of lakes in Nigeria. This study aimed at developing a macroinvertebrate-based MMI to assess the ecological status of lakes in North Central Nigeria. The study was conducted on Tagwai and Old Gawu Lakes, from April to October 2022. Sampling sites were clustered based on organic pollution and categorized into reference (four) and impaired (four) sites. Out of 54 macroinvertebrate-based candidate metrics, only five were selected after discriminatory, stability, and redundancy tests (performed using R software). The final metrics were abundance of Ephemeroptera + Trichoptera; abundance of Coleoptera + Ephemeroptera; Gastropoda richness; Shannon Wiener index; and percentages of shredders + predators + scrapers, hereafter referred to as North Central Nigeria-Lakes Multimetric Index (NCN-LMMI). The NCN-LMMI values ranged as follows: 21-25, 16-20, 11-15, and 5-10 corresponding to categories I, II, III, and IV for water quality, as indications of good, fair, poor, and very poor ecological status of the lake, respectively. The developed NCN-LMMI will be a useful tool for aquatic resource managers and environmentalists to assess the ecological condition of lakes, mainly the North Central Nigeria municipal lakes.

Preface

The development of aquatic resource science and management has grown rapidly in the last decade, both in the context of biology, ecology, and the management of the resources in them. Trends and scientific status of aquatic resources need to be well understood as a benchmark for scientific development and responding to future challenges. Thus, scientific forums are urgently needed to mutually discuss achievements and important issues in the science and management of aquatic resources.The Department of Aquatic Resources Management (ARM), Faculty of Fisheries and Marine Sciences (FFMS), IPB University took the initiative to provide the needed discussion space by holding the 2nd International Symposium on Aquatic Sciences and Resources Management – Highland to Ocean, which is then abbreviated as 2nd ISASRM H2O 2022, which takes the general theme, namely Biology, Ecology and Resources Management. As the activity of the second international symposium on the sciences and management of aquatic resources in Indonesia, the sub-themes raised from the international symposium included: aquatic biology and ecology; aquatic environment, ecosystem, and conservation; aquatic endangered, protected, invasive alien and exotic species, miscellaneous; integrated inland waters and coastal management; fisheries management; social-ecological system framework for aquatic resources management; aquatic bioprospecting; and aquatic natural products. Sub-themes can accommodate all the scientific focus of science and management of aquatic resources from upstream to downstream and contribute to scientists, researchers, practitioners, and stakeholders, both direct beneficiaries of aquatic resources, managers of aquatic resources, and processors of aquatic resource products. In addition, this activity is also expected to assist the government in responding to the challenges of managing water resources in the future and realizing sustainable integrated management dan sustainable development goals.Due to the Covid-19 Pandemic, the Indonesian government still restricts travel, and meetings in large numbers, so the 2nd ISARM was held virtually using the Zoom platform organized at the Department of ARM, FFMS, IPB University, Bogor, Indonesia on August 23-24, 2022. Virtual conferences are able to increase wider reach. However, time differences are challenging, and discussion interactions are not optimal. Hopefully, we can meet directly at another international conference at IPB University, Bogor, Indonesia.The symposium was attended by 72 oral presenters and 14 poster presenters. Presenters come from at least seven countries: Indonesia, China, Philippines, Turkey, United Kingdom, Norway, and Australia. The total participants of this activity were 166 participants, both national and international. The 2nd ISARM also presented five speakers from various scientific fields, including the Management Program of Coral Reef in Indonesia by Dr. Sri Yanti, MPM from Fisheries and Marine Directory BAPPENAS, Republic of Indonesia; Coastal and Marine Resources Conservation and Management By Dr. Ruby Castrence-Gonzales from Mindanao State University Naawan, Philippines; Exploring Drug Repurposing for the Treatment of Aquatic Diseases by Prof. Dr. Mohd Shahir Shamsir Omar from UTHM Deputy Vice Chancellor, Malaysia; Coastal Watershed Ecological Processes, Modeling, and Management by Prof. Jinliang Huang from Xiamen University, China; and The Negative Impact of The Alien Freshwater Crayfish Invading Indonesia and Sustainable Fisheries Development of Native Crayfish in Indonesia by Dr. Tadashi Kawai from Immediately Past President of the International Association of Astacology Hokkaido Research Organization, Japan. The oral and poster presentations also discuss the issues and challenges for aquatic ecosystems, which are closely related to anthropogenic activities as driving factors. Everything is connected from the highlands to the ocean. Despite all the challenges, we, as scientists, still have a chance to do research towards the sustainable development of aquatic resources management. Moreover, make a better world.Many new ideas, insights, methodologies, and state-of-the-art science can be studied and adopted to improve our work in this important area further. There have been many interesting and useful presentations in plenary and interactive sessions. Many good experiences have been shared and lessons learned, including in the aspects of biology and ecology and managing resources from the highland to the ocean.We would like to take this opportunity to thank all partners, namely the Department of Aquatic Resources Management (ARM IPB University), Faculty of Fisheries and Marine Sciences (FFMS IPB University), Center for Coastal and Marine Resources Studies (PKSPL IPB University), International Collaboration Office (ICO IPB University), Fisheries and Marine Directory BAPPENAS Republic of Indonesia, and Indonesia Climate Change Trust Fund (ICCTF) with the Coral Reef Rehabilitation and Management Program – Coral Triangle Initiative (COREMAP-CTI), for financial support and collaboration. Also, we would like to thank all the speakers, reviewers, and the committee for organizing this event and ensuring it runs smoothly.List of Editorial team, Organizing Committees are available in the pdf.

Growth pattern and the condition index of nomei fish Harpodon nehereus captured with mini-trawl in Tarakan Waters

Nomei (Harpodon nehereus) is a which is found in the northern waters of Tarakan City which has a fairly high economic value. The purpose of the study to analyze the growth patterns and condition index of the fish in Tarakan waters. The research was conducted in two periods, namely the period January-February 2022 and June-July 2022. The research method used a quantitative descriptive method. Fish samples were collected from fisher and data observed were total length, total weight, and sex. In January, the sampled H. nehereus consisted of males (n = 69) and females (n = 231) with allometric negative growth and both fat (male = 50.7%) and thin (female = 48.1%) body type were found. In February 2022, the growth of males (n = 70) and females (n = 224) were positive allometric and both type of body shape were found, with sex ratio of male 48.6% and female 51.4%. In June 2022, the growth of males (n = 980) and females (n = 680) were negative allometric with body shape of both fat (male = 48.1%) and thin (female = 48.5%). In July 2022, the growth of male (n=1197) and female (n=822) were negative allometric with body shape fat (male=49.1%) and thin (female 47.8%). A better management of aquatic biological resources, especially the stock of nomei fish (H. nehereus), is crucial for a sustainable resource.

MassWateR: Improving quality control, analysis, and sharing of water quality data.

The long-term protection and restoration of aquatic resources depends on robust monitoring data; data that require systematic quality control and analysis tools. The MassWateR R package facilitates quality control, analysis, and data sharing for discrete surface water quality data collected by monitoring programs of various size and technical capacity. The tools were developed to address regional needs for programs in Massachusetts, USA, but the principles and outputs can be applicable to monitoring data collected anywhere. Users can create quality control reports, perform outlier analyses, and assess trends by season, date, and site for more than 40 parameters. Users can also prepare data for submission to the United States Environmental Protection Agency Water Quality Exchange, thus sharing data to the largest water quality database in the United States. The automated and reproducible workflow offered by MassWateR is expected to increase the quantity and quality of publicly available data to support the management of aquatic resources.

Peer Review Statement

All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.• Type of peer review: Double Anonymous• Conference submission management system: Morressier• Number of submissions received: 64• Number of submissions sent for review: 65• Number of submissions accepted: 62• Acceptance Rate (Submissions Accepted / Submissions Received × 100): 96.9• Average number of reviews per paper: 2• Total number of reviewers involved: 27• Contact person for queries: Name: Dr. Fery Kurniawan Email: isarm@apps.ipb.ac.id Affiliation: Department of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, IPB University

Understanding and optimizing fish counting techniques based on electrical impedance measurements.

Sustainable aquatic resources management requires reliable methods for fish detection in various environmental conditions. Herein, we study fundamental mechanisms underlying the application of electrical impedance measurements in this regard. We present results of experimental studies conducted in laboratory conditions using a low-cost impedance measurement circuit, as well as the corresponding numerical models. We also present evaluation results of a newly developed, real-time detection algorithm based on adaptive thresholding. The numerical model was validated by extracting fish tracks in 3D space from the experimental datasets, and then comparing the calculated versus measured impedance values as functions of fish coordinates in time. Numerical predictions closely resemble the experimental data. The detection sensitivity and specificity values determined for various settings exceeded 90%. Electrode width to spacing ratio is demonstrated to be a crucial parameter influencing the system sensitivity distribution. The introduced approach can constitute a framework for designing electrical impedance-based fish counting systems.

Institutionalizing Cooperation and Sustaining Collective Action: The Case of the Binulasan Fisheries and Aquatic Resource Management Association

Institutionalizing Cooperation and Sustaining Collective Action: The Case of the Binulasan Fisheries and Aquatic Resource Management Association

Considering Urbanism at Mound Key (Caalus), the capital of the Calusa in the 16th Century, Southwest Florida, USA

In 1566, Pedro Menéndez de Avilés arrived at Mound Key, the capital of the Calusa polity. What he saw there was unlike anything else he would encounter in La Florida, a capital teaming with people and complex architecture that was essentially a terraformed anthropogenic island constructed mostly of mollusk shells situated in the middle of Estero Bay. The Calusa literally raised this landscape—51 ha in area—from the sea and built a complex canal system to the capital’s interior. The capital and its outlying towns did not practice large-scale agriculture, but rather relied upon harvesting and management of aquatic resources. Here, I outline the nature of urban processes at the settlement. From this evaluation, I argue that there are many similarities between the settlement and other urban areas of research, particularly in other parts of the Americas. I explore how the occupants of Mound Key worked through some of the experiences of urban processes present via collective action, specifically regarding waste management, transparent governance, and sustainability.